Buck, C., D. (1949). A dictionary of selected synonyms in the principal Indo–European languages: a contribution to the history of ideas. Chicago: University of Chicago Press.
[CDB]
Source
Falileyev, Alexander (2000). Etymological Glossary of Old Welsh. Tübingen: Max Niemeyer Verlag; FALILEYEV, Alexandre I. (2008). Le Vieux-Gallois. Potsdam: Universitätsverlag Potsdam
[Falileyev (2000)]
Source
Guus Kroonen. Etymological Dictionary of Proto-Germanic. Indo-European Etymological Dictionaries Online. Edited by Alexander Lubotsky. Brill. Brill Online.
[GK]
Source
Matasović, Ranko. Etymological Dictionary of Proto-Celtic. Indo-European Etymological Dictionaries Online. Edited by Alexander Lubotsky. Brill. Brill Online: http://iedo.brillonline.nl.ludwig.lub.lu.se/dictionaries/content/proto-celtic/index.html
[RM]
Source
Robert Farren, PIE culture words collection, 2017
[Farren (2017)]
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Ancestry Diagram
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Map
This map shows the etymological links in a geographic context.